Hi @Toga
Make sure you have backups.
Post “Diagnostic Info” from Admin > Troubleshooting from the old server. It sounds like it’s not even using RDS for the application database, which means it’s stored in H2 on the instance, which means it will be lost if you restart that instance.
You should keep the RDS separate/decoupled from the EBS - you might want to read these too:
Best practice for having RDS as part of EB environment
Elastic beanstalk app rebuild fail -> RDS restore 'backend' seems to work but can't acces http interface. any aws pro's want to freelance support?